Thermo Orion Star, User Manual

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Thermo Electron Corporation VIII-12 Orion Star Series Meter
Dissolved Oxygen Technique
9 . The slope value will then be displayed for three
seconds . The meter will then return to measure mode .
10 . After performing the probe zeroing, thoroughly rinse the
probe with deionized water .
Note: Prior to using the BOD funnel and bottle again, be sure
to remove all traces of the oxygen scavenging solution for
accurate measurements.
s
DO Measurememts
1 . Rinse the electrode, as well as ATC probe and stirrer if being used, in deionized
water . Blot dry with a lint-free tissue . Do not wipe glass electrodes as static
charge will build up on the sensor .
2 . Place the electrode in your sample .
a . If you are in continuous measurement mode, the instrument will start
measuring immediately . If you are using the benchtop meter & the stirrer
control is enabled then pressing
will start the stirrer .
The will flash until the reading is stable . Once the reading is stable you
can Log & Print the measurement by pressing the
. If you are recording
the data into a notebook, record the pH as well as the temperature at which
the pH reading is taken . If the stirrer is in motion, press
to turn off the
stirrer before removing the stirrer from the sample .
b . If you are in AUTO-READ™ mode then press to start the measurement .
Once the reading is stable the meter will automatically Log & Print the
results and freeze the display . If the stirrer is enabled, then the stirrer will
turn on when
is pressed and turn “off” once the reading has stabilized .